Doctor's Best Vegan Glucosamine Chondroitin MSM (GCMSM) contains three main ingredients universally known to support healthy joints and joint function: Glucosamine, Chondroitin, and MSM (Methylsulfonylmethane). This unique combination uses 100% plant-based GreenGrown Glucosamine Sulfate, the highest purity form of MSM OptiMSM, and the first formulation of its kind to contain Mythochondro's non-animal chondroitin sulfate. Non-animal derived chondroitin produces a higher concentration of chondroitin sulfate, which provides 43% more absorption than animal-derived chondroitin sulfate. Vegan GCMS supplies the body with glucosamine, a building block for proteoglycans and glycosaminoglycans. It also provides sulfur, the key element that helps maintain healthy joints, hair, skin, and nails. GreenGrown Glucosamine and Mythocondro Chondroitin are made using proprietary, eco-friendly fermentation technology and are vegan-friendly.